Grate for furnaces and boilers



INVENTOR. jmyw.

Z/,JATTURNEY J W yPIPER GRATE FOR FURNACS AND BOILERS Filed Feb. l, 1922NOV. 27, 1923.

Patented Nov. 27, 1923.

Unirse STATES v JOSEPH W. PIPER, OF LOWELL, 4MASSliCHUSEITS.

GRATE FOR FURNACES AND BOILERS.

Application filed February 1, 1922.

T aZZ whom t may concern:

' Be it knownv that I, Josnri-r WV. Ilrnn, a citizen of the UnitedStates, residing at Lowell, in the county of Middlesex and 5Commonwealth of Massachusetts, have invented a certain new and usefulImprovement in Grates for Furnaces and Boilers, of which the followingis a specification.

This invention relates to grates for furnaces and boilers such as have adivided lirechamber.

The invention comprises independently operated fuel-supporting grates,each arn ranged under a separate division of the fire chamber.

The object of the invention is to enable one division or compartment ofthe iire-loox to be emptied without disturbing the fuel in the otherdivision.

In the accompanying drawings Fig. 1, is a plan of the housing and thefuel-sup porting or main grate in operative or fuelsupporting position;Fig. 2, a similar view with one half of the grate-bars infuel-supporting position, the other bars being with drawn from under thefire chamber; the upper ring El is shown broken away to afford a clearview of the parts below'. Fig. 3, a plan showing all the grate-barswithdrawn and the upper pin-ring removed. Figs. 4 and 5, side elevationsof the lower and up. per pin-rings on which the grate bars are pivoted;Fig. 6, a vertical transverse section of the base of the boiler, with afront elevation of the grate; Fig. 7, a vertical transverse section ofthe base andv of the grate and of the lower part of a boiler withdivided lirechanibersg Figs. 8 and 9, reversed plans of two differentgrate-bars.

The base B, grate section of which supports the boiler proper D and thetransverse division F within said boiler D; these parts are or may beall as shown in U. S. patent granted tome Nov. 29, 1921, No. 1,398,794.With the above-named parts will also-preferably be used, the cut-olfgrate 'I with pivoted fingers t, arranged in the housing H, and thedraft ring L; all of which are or may be as shown in said patent and inanother Patent 629,719, to Goodfellow, granted July 25, 1899.

Vithin the housing H in the lower part thereof below the grate T, Iarrange the divided grate, the left-hand half consisting of lingers e1and the linger c3, pivoted to a Serial No. 533,463.

pin-ring E said pin-ring E resting and turning upon the bottom piece d,of the housing I-I, and the lingers el and c3 pivoted on pins eprojecting upward from the pin-ring E, through the pin holes c, saidfingers extending inwardly through openings Z1 into the fuel space.

In a similar manner the other half of the divided grate has a pin-ringEl which carries downwardly projecting' pins c5, on which are pivotedthe other half of the fingers e2 of the divided grate, these fingersresting on the` half of the pin-ring E, which has no pins on theright-hand half, and eX- tend vinwardly through the openings (Z1 in thehousing H.

Each pin-ring is provided with a suitable handle S Iintegral therewithand projecting radially therefrom, by which the corresponding pin-ringmay be turned to withdraw or project the fingers of such pin-ring bymeans of a suitable operating bar.

Figs. 8 and 9 show the under side of both styles of grate bars fordifferent grades of fuel and are shown cut out on their vertical concaveside to allow the retraction of the adjacent bar on the side firstwithdrawn from the fire-chamber, also the grate bar es on the ring E islonger than the other fingers or bars of the same pin-ring and ispivoted on a radial outward projection E2 from the said ring, to enablethe half of the grate first retracted to make a complete stroke.

It is only by the features e3 and e4, that the half of the. grate firstwithdrawn can be retracted against the adjacent bar at rest, as shown inFig. 2.

In operating the grate, the housing remaining stationary, the cut-offbars T, are first projected into the lire to sustain the burning fuel,after which the left-hand bars of the divided fuel supporting grate arewithdrawn by pin-ring E, then the righthand bars can also be withdrawnby the pinring El.

I claim as my invention 1. In 'combination with a cylindricalfirechaniber having vertical transverse dividing means, separatesuperimposed gratings, two sets of grate bars, one set of which ispivoted to the bottom of the upper grate-ring and the other set of whichis pivoted' to the top of the lower grate-ring and a suitable housingfor said grate-rings having ports, through which said grate barsproject, each set of grate bars being arranged under a separate divisionof said five-chamber'. 2. In'counbination with a cylindrieal'irechamberhaving vertical transverse dividing 5 means, separate superimposed`grate-ringshaving each its set of grate-bars to be operatedsuccessively; the set operating first' having its right-hand -barpivotedat a larger radiugs'gto effect`- a complete, Withdrawal',"V and the setoperating last having its left-hand bar cut-away on 'its verticalconcave side, to

permit vthe point offthg'adjacent bar to retract under it in

